One common theme is the display of Hermione's intelligence. Even when captured, she uses her vast knowledge of magic and her quick thinking to either attempt escape or manipulate her captors. Another theme is friendship. It often shows how her friends, like Harry and Ron, are determined to rescue her, highlighting the strong bonds between them.
In this fanfiction, the 'captured hearts' part could imply a deep emotional connection that develops between the two. It could be a very different kind of connection compared to what we see in the original works. Maybe it delves into themes of redemption for Bellatrix or a growth in Hermione's understanding of the dark side through her interaction with Bellatrix.
One popular 'hermione captured' fanfiction is 'The Captivity of Hermione Granger'. It delves into an alternate scenario where Hermione is captured by a group of dark wizards and shows her struggle and resourcefulness to escape. Another one could be 'Hermione's Captured Adventure' which focuses on her friends' attempts to rescue her while she tries to outwit her captors from within.
Voldemort may also try to extract information from her. Given Hermione's vast knowledge, he might think she knows secrets about the Order of Phoenix or Dumbledore's plans. He could use various dark magic methods to force her to talk.
The contrast between the two characters makes it interesting. Hermione is the good, studious witch, while Bellatrix is a dark and wild one. Their interactions can be full of tension and unexpected twists.
The story could develop with Hermione trying to escape on her own. She might use her intelligence to find weaknesses in the Death Eater's security. For example, she could figure out the patterns of their patrols and use her magic to create distractions.
Well, in this kind of fanfiction, perhaps Hermione is captured because she was on a solo mission to retrieve some important magical item. The Death Eaters could use her knowledge to try and break into the secrets of the Order of Phoenix. Meanwhile, Hermione could be using her wits to delay them and send out hidden signals for help.
Harry would be extremely shocked. He has always seen Snape as a complex figure, and Hermione capturing him would make him question a lot of things. He would likely try to get to the bottom of it and mediate between Hermione and Snape if possible.
Well, one aspect could be the unique take on the relationship between Hiccup and Draco in the fanfiction. It might explore how Hiccup's character, known for his ingenuity and courage in his original story, copes with being captured by Draco. Maybe Draco has some ulterior motives in this fan - made scenario.